Trolley.



UNITED STATES PATENT OFFICE.

CHARLES A. OLSEN, OF PITTSBURG, PENNSYLVANIA.

TROLLEY.

SPECIFICATION forming part 012' Letters Patent ,N 0. 724,927, dated April 7, 1903.

Application filed December 24, 1902. Serial No. 136,452. .'(No model.)

To ttZZ whom it may concern:

Be it known that I, CHARLES A. OLSEN, a-

citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, .have invented certain new and useful'lmpro'vements in Trolleys, of which the following is a specification, reference being had therein to the accompanying'drawings:

This invention relates to certain new and useful improvements in trolleys, and relates more particularly to that class that will retain a constant contact with the trolley-wire. The present invention relates to that class of trolley-poles wherein anelectric circuit is established and maintained between thestationary trolley-wire and the motors arranged in the moving car. 7 l

My invention further con templates to provide a pole that will be extremely simple, strong, durable, comparatively inexpensive to manufacture, and highly efficient in its use.

With the above and other objects in view the invention consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described, and specifparts throughout the several views,in which Figure l is a side elevation of my improved tlroley-pole, partly in section. Fig. 2 is a similar view more clearly illustrating'the operation of the pole. Fig. 3 is an enlarged side elevation, partly in section, of the joint.

In the drawings the reference-numeral 1 indicates one section of the trolley-pole, and the upper section is represented by the reference-numeral 2. Betweensaid sections is formed a knuckle-joint 3, which comprises two membershaving screw-threaded shanks adapted to be received in the sections of the trolley-pole.

A hanger 4 is rigidly secured at 5 to the upper section 2 of the trolley-pole, said hanger carrying an eye 6, to which is secured the coil-spring 7, which extends downwardly and is connected to the eyebolt -8. The square body portion of said eyebolt extends through the guide '9, which is rigidly secured to the trolley-pole section'l. The threaded portion 10 of the eyebolt extends through the bracket 11, which element is also rigidly secured to the section of the pole 1, and an adj ustingnut 12 is secured upon the end of the threaded portion of the eyebolt, and a jam-nut 14 is also secured upon the threaded portion, as

shown in Figs. 1 and 2 of the drawings. This diminishing the tension of the coil-spring 11.

.Anauxiliary spring 15 is arranged to-the sections of the joint 3, said spring being preferably a retractile spring having its free ends formed into hook portions, which are adapted to be seated in suitable recesses formed in the extensions 16 of the joint members, as clearly illustrated in Fig. 3 of the drawings.

The reference numeral 17 indicates the trolley-harp, and 18 the trolley-wheel, which are of the ordinary and well-known construction. The trolley-wire is represented by the numeral 19. i

It is a well-known fact that trolley-wheels are often displaced on account of the varying distance between the car and the trolleywire, and by this device, as heretofore described, I have provided the compensating or yielding connection, which will accommodate itself to the various distances between the car and the trolley-wire and will effectually at all times form an electric contact with the wire and prevent the displacement of the wheel, as is usual with the ordinary trolley-pole now in use.

Particular attention is directed to the fact that the device may be used with a single I claim as new, and desire to secure by Letters In testimony whereof I affix my signature Pal-gent, isin the presence of two witnesses.

trolley-pole formed of two sections, a 1 knuckle-joint connecting said sections, re- CHARLES OLSEN 5 cessed extensions carried by the members of Witnesses:

said joint and a, spring having hooked ends H. O. EVERT, arranged in the recesses of the said extensions. A. M. WILSON. 

